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Re: Can't change brightness on Dell Studio 1749

On 30 Mar 2010, Ustun Kaya wrote:
> Hello folks,
> I installed Debian Squeeze on Dell Studio 1749 and I can't change the
> brightness when the OS is up (Fn + F4 - F5 doesn't work). It works
> when the BIOS screen is open, before booting into Debian. xbacklight
> gives the following output:
> ustun@Earth:~$ xbacklight -get
> No outputs have backlight property
> Any help?
> Best,
> Ustun

I had a similar problem on my HP laptop. I solved it with the following
(as root):

echo 10 > /sys/devices/virtual/backlight/acpi_video0/brightness

I've put it in /etc/rc.local to save having to enter it manually each


Anthony Campbell - ac@acampbell.org.uk 
Microsoft-free zone - Using Debian GNU/Linux 
http://www.acampbell.org.uk - sample my ebooks at

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